Experimental investigation of the effect of Al2O3 nanoparticles with spherical and rod-shaped morphologies on the thermophysical properties of ionic nanofluids

Document Type : Article


1 Department of Chemical Engineering, Arak Branch, Islamic Azad University, Arak, Iran

2 Department of Chemical Engineering, Faculty Engineering, Tarbiat Modares University, Tehran, Iran



Ionic Liquid(IL)now refers to fluids that are liquid at temperatures above 100°C, they are called "Green"solvents.One of their applications is in heat transfer and solar collectors.Thermophysical properties can be improved by adding nanoparticles to the IL.For this reason,spherical and rod-shaped alumina nanoparticles were added to 1-Hexyl-3-methyl imidazolium hexafluorophosphate IL with different weight percentages. The effect of adding nanoparticles on thermophysical properties of IL such as density,viscosity,thermal conductivity, and heat capacity in 0.05,0.1 and 0.5 %wt of nanoparticles at temperatures of 20, 30, and 50 °C is investigated. Increasing the concentration of nanoparticle set out an increase in density, viscosity, and thermal conductivity and a decrease in the thermal capacity of the ionic nanofluid (INF) compared to the base IL.Also, the viscosity, density, and thermal conductivity in INF with rod-shaped alumina nanoparticles are improved more than spherical alumina nanoparticles. Also the experimental viscosity and thermal conductivity data were fitted with the existing theoretical models. the viscosity of spherical alumina-IL and rod-shape alumina-IL was in unison with particles aggregation effect (Krieger-Dougherty model) and the both INF effective thermal conductivity are prognosticated by interfacial layer approach with sufficient accuracy.Eventually nonlinear equations have also been proposed for changes in the thermophysical properties of viscosity.


References 1. Eastman, J.A. and Choi, U.S. Anamalously increased e_ective thermal conductivites of thylene glycol-based nano uid containing copper nano particles", Applied Physics Letters, 78, pp. 718{728 (2001). 2. Vishwas, V. and Vadekar, M. ILs as heat transfer uids - An assessment using industrial exchanger geometries", Applied Thermal Engineering, 111(25), pp. 1581{1587 (2017). 3. Lamas, A., Brito, I., Salazar. F., et al. Synthesis and characterization of physical, thermal and thermodynamic properties of ILs based on [C12mim] and [N444H] cations for thermal energy storage", Journal of Molecular Liquids, 224, pp. 999{1007 (2016). 4. Valkenburg, M.E., Vaughn, R.L., Williams, M., et al. Thermochemistry of IL heat-transfer uids", Thermochimica Acta., 425, pp. 181{188 (2005). 1462 S. Asleshirin et al./Scientia Iranica, Transactions C: Chemistry and ... 28 (2021) 1452{1463 5. Sa_arian, M. and Moravej, M. Heat transfer enhancement in a at plate solar collector with di_erent ow path shapes using nanouid", Renewable Energy, 146, pp. 2316{2329 (2020). 6. Guo, Y. and Liu, G. Solvent-free ionic silica nanouids: Smart lubrication materials exhibiting remarkable responsiveness to weak electrical stimuli", Chemical Engineering Journal, 383, pp. 123{202 (2020). 7. Ribeiro, A.P.C., Louren_co, M.J.V., and Nieto de Castro, C.A. Thermal conductivity of ionanouids", 7th Symp. Thermophysical Properties, Boulder, pp. 21{26 (2009). 8. Nieto de Castro, C.A., Lourenco, M.J.V., and Ribeiro, A.P.C. Thermal properties of ILs and ionanouids of imidazolium and pyrrolidinium liquids", J. Chem. Eng. Data, 55(2), pp. 653{661 (2010). 9. Nieto de Castro, C.A., Murshed, S.M.S., and Santos, F.J.V. Enhanced thermal conductivity and speci_c heat capacity of carbon nanotubes ionanouids", Int. J. Therm. Sci., 62, pp. 34{39 (2012). 10. Ribeiro, A.P.C., Vieira, S.I.C., and Franca, J.M. Thermal Properties of ILs and Ionanouids" (2010). 11. Nieto de Castro, C.A. and Murshed, S.M.S. Enhanced thermal conductivity and speci_c heat capacity of carbon nanotubes ionanouids", International Journal of Thermal Sciences, 62, pp. 34{39 (2012). 12. Nieto de Castro, C.A., Murshed, S.M.S., Lourenco, M.J.V., et al. Enhanced thermal conductivity and speci_c heat capacity of carbon nanotubes ionanouids", International Journal of Thermal Sciences, 62, pp. 34{39 (2012). 13. Franca, J.M.P., Vieira, S.I.C., Louren_co, M.J.V., et al. Thermal conductivity of [C4mim][(CF3SO2)2N] and [C2mim][EtSO4] and their IoNanouids with carbon nanotubes: Experiment and theory", Journal of Chemical & Engineering Data, 58(2), pp. 467{476 (2013). 14. Murshed, S.M.S., Nieto de Castro, C.A., et al. E_ect of surfactant and nanoparticle clustering on thermal conductivity of aqueous nanouids", J. Nanouids, 1, pp. 175{179 (2012). 15. Wang, B. and Wang, X. IL-based stable nanouids containing gold nanoparticles", Journal of Colloid and Interface Science, 362, pp. 5{14 (2011). 16. Elise, B.F., Ann, E.V., Nicholas, J., et al. Thermophysical properties of Nanoparticle-Enhanced ILs (NEILs) heat-transfer uids", Energy Fuel, 16, pp. 3385{3393 (2013). 17. Titan, C.P. and Morshed, A.K. Nanoparticle enhanced ILs(NEILS)as working uid for the next generation solar collector", Procedia Engineering, 56, pp. 631{636 (2013). 18. Franca, J.M.P., Reis, F., and Vieira, S.I.C. Thermophysical properties of IL dicyanamide (DCA) nanosystems", J. Chem. Thermodynamics, 79, pp. 248{257 (2014). 19. Nieto de Castro, C.A., Louren_co, M.J.V., Ribeiro, A.P.C., et al. Thermal Properties of ILs and Io- Nanouids of Imidazolinium and Pyrrolinium Liquids", J. Chem. Eng. Data, 55, pp. 653{661 (2010). 20. Liu, J., Wang, F., Zhang, L., et al. Thermodynamic properties and thermal stability of ionic liquidbased nanouids containing graphene as advanced heat transfer uids for medium-to-high-temperature applications", Renewable Energy, 63, pp. 519{523 (2014). 21. Titan, C.P., Morshed, M., and Jamil, A. E_ect of nanoparticle dispersion on thermophysical properties of ionic liquids for its potential application in solar collector", Procedia Engineering, 90, pp. 643{648 (2014). 22. Wang, F., Han, J., Zhang, Z., et al. Surfactantfree ionic liquid-based nanouids with remarkable thermal conductivity enhancement at very low loading of graphene", Nanoscale Research Letters, 7, pp. 276{314 (2012). 23. Ferreira, A.G.M. and Sim~oes, P.N. Transport and thermal properties of quaternary phosphonium ionic liquids and IoNanouids", J. Chem. Thermodynamics, 64, pp. 80{92 (2013). 24. Titan, C.P. and Murshed, A.K.M.M., et al. Enhanced thermophysical properties of NEILs as heat transfer uids for solar thermal application", Applied Thermal Engineering, 110, pp. 1{9 (2017). 25. Zongchang, H.X. and Zhao, Z.J. Measurment of thermal conductivity, viscosity and density of ionic liquid[EMIM][DEP]-based nanouids", Chinese Journal of Chemical Engineering, 24, pp. 331{338 (2016). 26. Astam, K.P., Dutta, A., and Bhaumik, A. Selfassembled mesoporous-Al2O3 spherical nanoparticles and their e_ciency for the removal of arsenic from water", Journal of Hazardous Materials, 201, pp. 170{ 177 (2012). 27. Chen, X.Y., Zhang, Z.J., Liang, X., et al. Controlled hydrothermal synthesis of colloidal boehmite (- AlOOH) nanorods and nanoakes and their conversion into -Al2O3 nanocrystals", Solid State Communications, 145, pp. 368{373 (2008). 28. Murshed, S.M.S., Leong, K.C., and Yang, C. Investigations of thermal conductivity and viscosity of nanouids", International Journal of Thermal Sciences, 47(5), pp. 560{568 (2008). 29. Alawi, O.A. and Sidik, N.A.C., et al. Thermal conductivity and viscosity models of metallic oxides nanouids", Int. J. Heat Mass Transfer., 116, pp. 1314{1325 (2018). 30. Selvakumar, R.D. and Dhinakaran, S. E_ective viscosity of nanouids - A modi_ed Krieger-Dougherty S. Asleshirin et al./Scientia Iranica, Transactions C: Chemistry and ... 28 (2021) 1452{1463 1463 model based on particle size distribution (PSD) analysis", J. Mol. Liq., 225, pp. 20{27 (2017). 31. Yu, W. and Choi, S.U.S. The role of interfacial layers in the enhanced thermal conductivity of nanouids: A renovated Maxwell model", J. Nanopart. Res., 5(1), pp. 167{171 (2003). 32. Arul Raja, R.A. and Sunil, J. Estimation of thermal conductivity of nanouids using theoretical correlations", International Journal of Applied Engineering Research., 13, pp. 7932{7936 (2018).